It usually proceeds in whatever manner your CA deems most suitable. As some things like the Fitness test last only a year. So they might hold off on that until closer to your likely Raleigh date. However, its usually RT-Medical-PJFT-Interview. Some people have had a different experience so its possibly varied from AFCO to AFCO

As Scouse says it all varies; I myself had my RT then my PJFT and then my interview and medical on the same day. You should take into account the effects the defence cuts have had on recruitment and prepare yourself for the possibility of waiting quite some time to complete everything. Best of luck to you!